An Autonomous System Number (ASN) is a unique number assigned to a network in global internet routing. Every provider that participates directly on the internet has its own ASN (e.g. AS15169 for Google).

What are upstreams, peers and prefixes?

Upstreams are transit providers through which an AS reaches the internet. Peers are networks with direct traffic exchange. Prefixes are the IP address ranges the AS announces via BGP.

Where does the ASN data come from?

The data comes from the official RDAP services of the RIRs (RIPE, ARIN, etc.) and from RIPEstat (prefixes and neighbour ASNs).

ASN Lookup – Networks, Upstreams and Prefixes

AS5774

ASN

ARIN

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS5774

NameUSPS-001

OrganisationUnited States Postal Service

Country –

RIRARIN

Allocated18.10.1995

Network Overview

IPv4 Prefixes30

IPv6 Prefixes2

Upstreams (Transit)6

Downstreams (Customers)0

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS13367Comcast Cable Communications, LLC AS33651Comcast Cable Communications, LLC AS4296CenturyLink Communications, LLC AS6224CenturyLink Communications, LLC AS701Verizon Business AS7018AT&T Enterprises, LLC

AS5774USPS-001

Downstreams (Customers)

none

Upstreams (Transit) (6)

AS13367Comcast Cable Communications, LLC

AS33651Comcast Cable Communications, LLC

AS4296CenturyLink Communications, LLC

AS6224CenturyLink Communications, LLC

AS701Verizon Business

AS7018AT&T Enterprises, LLC

IPv4 Prefixes (30)

56.105.128.0/24

56.0.155.0/24

56.105.120.0/22

56.235.128.0/17

56.0.146.0/24

56.105.65.0/24

56.105.156.0/22

56.0.91.0/24

56.0.151.0/24

56.0.64.0/19

56.0.208.0/20

56.235.0.0/17

56.0.128.0/19

56.0.103.0/24

56.0.152.0/24

56.105.80.0/22

56.235.0.0/16

56.105.0.0/16

56.105.64.0/18

56.105.84.0/23

56.0.0.0/16

56.105.67.0/24

56.105.128.0/18

56.105.72.0/21

56.0.192.0/20

56.0.95.0/24

56.105.164.0/22

56.105.108.0/22

56.105.129.0/24

56.0.32.0/20

IPv6 Prefixes (2)

2610:68:4000::/34

2610:68::/32

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What is an ASN?

An Autonomous System Number (ASN) is a unique number assigned to a network on the internet. Upstreams are the transit providers through which the AS reaches the internet. Peers are networks with which direct traffic exchange takes place. Prefixes are the IP address ranges that the AS announces to the internet. Data via RIPE NCC RDAP and RIPEstat API.